I have a Simpson Duke 3 that I have used more or less 6 days a week for the last 6 months. I have noticed that it is always damp toward the center of the knot. I store it on the open counter on a rack upside down and shake it out well after each use. It has started to shed a few hairs everyday, which has me a little worried as I like the brush. So my questions would be: would getting another brush and rotating help extend it's life? Is this shedding normal? Can one brush be used everyday? Your knowledgeable input would be appreciated.